Concrete-molding form.



H. 0. mvmsou. CONCRETE MOLDING FORM.

APPLICATION FILED FEB; 2|. 19x1.

Patented July 2, 1918.

2 SHEETSSHEET l.

H. 0. DAVIDSON.

CONCRETE MOLDING FORM.

APPLICATION man ma. 21. I917- Patented July 2,1918.

2 SHEETS-SHEET 2 ]f a/ STATES PATENT OFFICE.

HARRY O. DAVIDSON,-OF CLEVELAND HEIGHTS, OHIO, ASSIGNOR TO THE HYDRAULIC PBESSED'STEEL COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

CONCRETE-MOLDING FORM.

To all whom it may concern.-

Be it known that I, HARRY O. DAVIDSON, a citizen of the United States, residing at Cleveland Heights, in the county of Cuyahoga and State of Ohio, have invented a certain new and .useful Improvement in Concrete-Moldin Forms, of which the followin is a ful, clear, and exact description,

I re erence being had to the accompanying drawings.

This invention relates to the construction of mold forms or frames employed for the purpose of molding walls, ceilings, or other shapes from concrete or composition materials and in which forms or frames the material may be placed in a wet and semiplastic condition and allowed to set and harden. It is the general object of the invention to provide a frame or form of this character which possesses great flexibility, whereby it may be used, with a minimum of alterations and additions, for various kinds of work incidental to building and other constructions.

The invention contemplates the use of a unit consisting of a pair of posts or up-' rights, an interposed mold plate, and clamping devices for securing such plates to the posts. In addition to this unit, the invention includes a cooperating construction of posts and rangers or sills Whereb a plurality of posts may be spaced a desired distance apart and be maintained in such spaced and lined positions; also a special construction of plate'which not only enables it to be conveniently applied to the posts but which plate is so constructed as to render it capable of withstanding severe usuage as well as presenting a continuous smooth surface toward the material which is to be molded;

' also the provision of means cooperating with the plates and posts hereinbefore referred to for forming a cored or ventilated wall and which means may be conveniently assembled between said plates and posts and thereafter may be easily collapsed and removed. The invention finally contemplates a particularly efiicient means for connecting the opposed sides of the mold and which means also cooperates withth'e core parts whereby a hollow wall may be formed.

In the drawings, Figure 1 represents 21 pers ectiveview showing my invention as emp oyed in the construction of hollow or ventilated Walls; Fig. 2 a plan view of such Specification of Letters Patent.

Patented July 2, 1918.

Application filed February 21, 1917. Serial No. 150,040.

away, of one of the clamping devices by.

which the mold plates may be secured to opposite sides of a post; Fig. 5 a detail in plan of one of the posts with the cooperating part of one of the stay bolts; and Fig. 6 a detall in perspective of the parts by which the core plates (those which are employed to make a hollow wall) may be braced apart and collapsed. 4

Each post or rib hereinbefore referred to conslsts of an outer flat face 1 with inclined sldes 2 having each a laterally extending flange 3, said flanges having secured thereto a plate 4 whereby a hollow post or upright is formed. Each side 2 and each flange 3 of a post cooperates with a mold plate which seats upon the flanges, the inclination of the sides 2 providing, with the adjacent lateral end of each plate, an increasing clearance between such sideand end as the plate is moved outwardly away from the molded wall, thus facilitating the removal, of the plates when the concrete has set or hardened. In order to provide a smooth surface and to enable the plate to withstand repeated usage, I prefer to make each plate from one or more wooden boards 5 having one or more metallic plates 6, preferably steel, applied to the inner face thereof.

Where the plate cooperates with two of the posts, each end thereof will preferably be constructed in the manner shown in Fig. 3. The lateral ends of the boards 5 are rabbeted or recessed, as indicated 'at 5, 5", and 5. The rabbet 5*, 5, is a double rabbet. The to and bottom of each board is also provided with a rabbet 5. Cotiperatin with the top and the bottom of the boar are angle plates 7, each having a flange 7. To protect the lateral ends of the boards, channeled members 8 are provided having apertures 8 therein for the reception of screws. One of the flanges 8 is adapted to enter the rabbet 5 while the other and shorter flange 8 receives therewithin one of the flanges of an angular reinforcin member that is applied to the double rafibet 5, 5". 9 denotes a reinforcing member or plate which is so shaped as to fit within the .double rabbet 5, 5". Each plate 9 extends from the upper rabbet to the like lower rabbet. .With the parts constructed and arranged as described, the plates 9.will be applied to'their rabbets 5, 5" and be secured to the board, as by 5 screws; the plates 7 will then be applied to j the top and bottom of each of said boards with their flanges '2' within the rabbets 5 k and. their ends flush with the lateral ends of \the boards. The channels 8 will then be applied to the opposite ends of the boards 5, twith the flanges 8 covering the'fianges of the plates 9 that are within the rabbets 5 while the flanges 8 fit within the rabbets 5*, 1 thechannels being secured to the board by means of screws extending through the openings 8 into the ends of the board. The plate 6 may then be secured to the inner face i of'the board, as by spot-welding the same to 5 the inner flanges of the reinforcing mem- 2j0 bers 9, the plate and the flanged reinforcing members or'plates 7 8 and 9 cooperating to form a unitary metal reinforcement for the exposed and work-facing portions of the mold plate. Where the plate is to be used between a pair of ribs or posts, eachlateral end thereof will preferably be finished in the mannerdescribed. Under certain conditions, only one lateral end of a board will cooperate with a 0st, in which case one lateral end only wil be. constructed and protected in the manner described. The construction of the lateral ends and inner faces of the mold plates afiords adequate protectionfor the wood or other material of which the bodies of the plates may be composed and provides a construction which cooperates with the posts and with the clamping members associated therewith.

' For the purpose of securing the plates between the posts, it is preferred to employ clamps of the character illustrated in Figs. 1, 2 and 4. a Each of these clamps comprises a U-shaped channeled yoke having the inwardly projecting legs 10 and the connecting-web 11. The legs are adapted to engage the channel flanges 8 at the lateral ends of adjacent'mold plates and thereby force such plate ends against their seats upon the opposed flanges 3. For the purpose of forcing the yoke legs inwardly against the ends of the plates, a locking device is employed which is capable of an adjustment enabling the yokes to be turned at right angles to their locking positions and with the inner ends of the legs thereof bearing against the outer face 1 of each post. Each of the posts is provided with a suitable number of keyhole slots comprising each a central circular opening 12 and a pair of narrow slots 13 extending in opposite directions therefrom and lengthwise of the posts. Each slot is adapted to receive a locking bolt (shown in detail in Fig. 4) and conveniently constructed from two flat metal 66 plates 14 riveted together. At their inner ends, these plates are rounded and bentoutwardly,'as shown at 15, to form a head. Intermediate of their ends, the plates are provided each with an outwardly projecting tongue 16 forming jointly a head of less width than that formed by the projections 15. The head 15 is of greater diameter than the central part 12 of the keyhole slot while the head 16 is of less diameter than such central opening but of greater widththan the slots 13. At its outer end, thebolt formed by theplates 14: is provided with a slotv 17 which is adapted to receive a wedge key 18,

which key, after havin been inserted into said slot, may be provi ed at opposite ends with rivets 18 constituting projections preventing the wedge from dropping out of the slot. 7

In assembling, it will be necessary to insert the bolts within their respective keyhole slots before the plate 4; is applied to the posts. When it is desired to clamp the lateral ends of the boards toa post, the yoke.

and the bolt which extends through the web of such yoke will be moved upwardly or downwardly into one of the narrow slots 13,

the head formed by the tongues 16 engaging the web 1. The wedge 18 will then be driven 7 in, forcing the yoke legs into enga ement with the channel flanges 8, and t ereby clamping the boards in place. molding operation has been finished, the key 18 will be driven out a sufficient distance to enable the bolt to be moved into the central When the posite sides of such central opening. The I distance between the heads of the bolt is such that, when the head 15 is in engagement with the web 1, the ends of the yoke legs 10 will clear the outersurfaoe of the web, enabling the clamping yoke and the bolt to be turned at right angles to the position shown in Figs. 2 and 4. The key 18 may then be driven in and the yoke will be retained against the outer face of the post with the ends ,of its legs bearing against said face. The-yoke and the keys will then extend longitudinally of the post, a position wherein they are accessible for re-use and wherein they'do not materially interfere with the shifting or transportation of the posts.

Cooperating with the posts on opposite sides of the molding space are tie rods which, in hollow-wall constructions, will be embedded within the concrete in order to provide a bond or tie for the same. In Figs. 1 and 2,

two of these tie rods are shown and each conveniently formed from a single flat metal strap having atopposit'e ends thereof a loop having a flat plate 21 which extends substantially parallel to the inner face 4 of the ad'acent post. Each flat plate 21 is provided with a reinforcing plate 21 whlch may be spot-weldedtothe inner face there of, within the loop. .Cooperatmg. with each end of the tie rod is a bolt 22 which extends through the faces 1 and4 of a post, the inner end of each bolt extending through a washer 22 and an aperture 21 in the plate 21 and being threaded into the reinforc ng plate21, the outer end of each bolt being provided with a collar 23. 'Each collar is provided with an aperture therethrough, one side of which is angular, as shown at 24, to form a seat for the corresponding angular portion of the bolt 22. The bolt 25 is threaded into the collar opposite the angular side of the bore and is adapted to force the angular projection of said bolt into the seat 24. The ends of the metal strap 19, after having been bent to form the loops 20, may be spot welded to the body portlon of such strap.

In practice, the bolts 22 will be inserted through appropriate key hole slots 12, 13, and the collar 23 will ordinarily extend across the enlarged central portion 13 of such slots, the collar and the bolt 25 providing a conveniently adjustable abutment for the outer end of each bolt, which abutment is adapted to bear against the outer face 1 of a post.

When a simple tie rod is required,the parts 1925 will be suflicient, it being evident that the parts 1921 may be left within the con crete by merely removing the bolts 22, plastering the holes left by the washers 21 to make a smooth-finished wall. Where it is desired to form a hollow or ventilated wall, the tie rod will have associated therewith certain other parts which coiiperate with the core plates to assist in supporting the same in molding position and to permit their convenient removal after the completion of the molding operation. Where it is desired to construct such a hollow wall the strap 19 will have secured thereto Z-s aped bracing members each having a flange 26 by means of which it may be spot-Welded to the strap, a flange 27 extending at right angles to the first mentioned flange, and a short flange 28 extending at right angles to the second flange. The flanges 28 will be of sufficient length to form a guide for the outer ends of the flange of a removable angle plate which braces and supports the outer side of the lateral end of a core plate. It will be understood that the parts 19-28, inclusive,

will be duplicated at the bottoms of the core plates. Each of the braces or supports is preferably an angular metal shape, comprising the flange 30 (which is adapted to' bear against like faces of the upper and lower tie rods 19) and the flange 31 which projects at right angles fromthe flange 30 and which is slidably supported by the flanges 27 and 28 of the upper and lower flanges 27 and 28 and the outward thrust of the core plate. The ends of the core plates are preferably protected by means of channels 29 and these channels preferably extend beyond the flanges 28, the last mentioned flanges being preferably of a little less length than the thickness of the flanges 31 whereby the last mentioned flanges may engage the lateral ends of the core plates and form continuous braces and supports therefor.

For the pun ose of retaining the core plates in operative relation to the work and to permit their easy removal after the work has been completed, it is preferred to employ the spreading and internal bracing means such as shown in Figs. 1, 2 and 6. 32 denotes a channel member having the web 32 and the side flanges 32". The channel member 32 tapers or diminishes in width from the top to the bottom thereof. Cooperating with this channel member is a channel member 33 comprising the web 33 and the side flanges 33", the member 33 being reversely tapered from the member 32. It will be obvious that, by moving the member 32 downwardly along the member 33, the joint width of said members will be increased without affecting the parallelism of the outer flanges 32", 33", while, by movin the member 33 in a reverse direction, the oint width will be decreased. In order to facilitate the assembling, adjustment, and the dis-assembling of the members 32 and 33, a third channel member 34 having a web 34 and the flanges 34 will be secured to the inner flange of the member 33, as by spot-welding its web to such flange. The member 34 thus provides an extended bearing between the adjacent flanges of the'members 32 and 33 and the flanges 34 prevent the member 32 from being displaced while it is being driven a in place as well as to guide said member during its removal.

In forming a hollow wall with the parts constructed as described, the plates 5, 6 will be applied and clamped to the posts in the manner hereinbefore described and thetie rods, with the parts 2628, will be secured to the posts. The angle members 30, 31 will then be introduced into the guides provided therefor by the straps 19 and the angle members 2628. The core plates will then be inserted between the members 30, 31. Then the channel members 33 and 34 will be inserted, after which the channel members 32 will be inserted and driven in place. After the molding operation has been completed,

- then be shifted upwardly andthe the members 32 will be withdrawn, after which the remaining core-plate supporting members and the core plates themselves may be readily removed, leaving within the wall the tie rods 19-21 and their attached angle members 26-28. The plates 5 and 29 may be repeated.

In order to properly support and aline inserted between the flanges of the channel 35, the flanges of the members 37 being of such depth as to bring the webs thereof substantially flush with the edges of the flanges of the channel 35 when the ends of the flanges 37 of said channel members are abu ting against the web of the channel 35.

s The channel members 37 are applied to the channel 35 at the broaches or notches 36 and are preferably of the same length as said broaches or notches; The channel members37 will be secured in place preferably by spot-welding the flanges thereof to the flanges of the channel 35. Each member 37 has an aperture 37 in its web for the reception of a bolt 38 which may be similar to the bolts 14.-17, hereinbefore described, except that the bolts 38 will each be provided with but a single head which is adapted to engage the inner wall of the outer face 1 of each post. The bolts 38 are intended to exi tend through the keyhole slots in the outer face 1 of each post and each bolt is provided with a slot at its outer end for the reception of a wedge key '39 which will bear directly against the web of the channel members 37. This construction of the longitudinal sills enables them to support the osts in properly spaced and alined positlons and also enables the posts to be adjusted toward and from each other along said sills to accommodate varying lengths of mold, plates. It will be evident that, when the sills or rangers are connected to the posts, the posts will be assembled and alined in proper relation to each other to enable them to be moved and set up in such alinement as well as to permit the sills and the posts connected thereto to be shifted as the work proceeds and without the necessity for re-alining and re-connecting the posts to the sills; also that, when it is desired to vary the distance between the posts to accommodate longer or shorter mold plates, this variation may be easily effected operation by' moving the posts into different notches or broaches in the sills and reconnecting the posts to the sills at such broaches or notches;

.For convenience of description, theupw right members between Wh10l1 the mold boards are supported will be designated in the claims hereto annexed as posts; also the mold elements interposed between the posts and which coo erate therewith to mold the wall will be re erred to as plates, it being understood that, by the use of this term, I do not limit myself to any particular material which may be employed in the construction of such elements.

Having thus described my invention, what I claim is I 1. In a form of the character described, the combination, with a,plurality of posts and mold plates interposed therebetween, of a channeled sill having broaches or notches in the web thereof adapted to receive the outer faces of said posts therewithin, chan neled members fitted between the flanges of said sill with their webs opposed to the web of said sill, bolts adapted to be connected'to said posts and to project through the webs of said channeled members, and means cooperating With said bolts and said channeled members for securing the sill to said posts.

2. In a form of the character described, the combination, with a plurality of posts and mold plates interposed therebetween, of a channeled sill having broaches or notches in the web thereof adapted to receive the outer faces of said posts therewithin, channeled members applied to the flanges of said sill, and means cooperating with said members for securing the sill to said posts.

3. In a form of the character described, the combination, with a plurality of. posts and mold plates interposed therebetween, of a channeled sill having broaches or notches in the web thereof adapted to receive the outer faces of said posts therewithin, channeled members fitted between the flanges of said sill, with their webs opposed to the web I of said sill, bolts adapted to be detachably connected to said posts and to project through the webs of said members, said bolts being provided each with a slot, and a wedge key for each of said bolts adapted to be driven through the slotthereof and to engage the web of a channeled member.

4. Ina form of the character described, the combination, with a plurality of posts and mold plates interposed therebetween, of a channeled sill having broaches or notches in the web thereof adapted to receive the outer faces of said posts therewithin, chan neled members applied to the said'sill with their webs opposed to the'web of said sill, and connecting means cooperating withthe webs of said channeled members for securing the sill to said posts.

5.'In a form of the character described,

the combination, with a pair of opposed posts, of a tie rod extending between said posts, said tie rod having a loop at each end tending through each of said posts and into the adjacent loop of the tie rod and threaded into the reinforcing plate in such loop, and an adjustable abutment on the outer end of each of said bolts and adapted to bear against the outer face of the cooperating ost.

7. A tie rod for use in connection with cored walls, said tie rod having means whereby it may be attached to opposed posts of a form and being provided intermediate of its ends with an abutment adapted to slidably engage a support for the lateral end of a core plate.

8. A tie rod for use in connection with cored walls, said tie rod having means whereby it may be attached to opposed posts of a form and provided between its ends with laterally projecting braces forming slide ways for removable members which are adapted to be engaged by the work-facing sides of the lateral ends of core plates.

9. A tie rod for use in connection with cored walls, said tie rod having means whereby it may be attached to opposed posts of a form and provided intermediate of its ends with pairs of laterally projecting braces, each brace adapted to slidably sup port a removable member which bears against and forms a support for the workfacing side of the lateral end of a core plate.

10. As a means for forming cores in hollow walls, the combination, with a pair of tie rods each having transversely spaced braces extending therefrom, of a pair of mold plates interposed between said braces, a pair of supporting members for the workfacing sides of the lateral ends of said plates, each of, said members being adapted to engage and be supported by the cooperating braces of said tie rods, and means removably inserted between such plates for the purpose of holding the lateral edges thereof in engagement with said supporting members.

11. As a means for forming cores in hollow walls, the combination, with a pair of tie rods each having transversely spaced braces extending therefrom, of a pair of mold plates interposed between said braces, a pair of supporting members for the workfacing sides of the lateral ends of said cores, each of said members being adapted to slidably engage and be supported by the cooperating braces of said tie rods, and means removably inserted between such (plates, and servin to wedge them apart an press the lateraFedges thereof into engagement with said supporting members.

12. As a means for forming cores in hollow walls the combination, with two pairs ofverticaily spaced tie rods, said pairs being laterally spaced and each rod having a pair of spaced braces extending therefrom, of a air of mold plates interposed between said races, removable supporting members for the work-facing sides of the lateral ends of such plates and interposed between such sides and said braces, and removable means interposed between said plates for forcing the same apart and into engagement with the said supporting members.

13. As a means for forming cores for hollow walls, the combination of two pairs of vertically spaced tie rods, said pairs being laterally spaced and each rod being provided with a pair of laterally extending braces,

' each brace forming with its tie rod a uideway, supporting members for the wor -facing sides of the lateral ends of coreplates slidably mounted in such guideways, a pair of core plates cooperating with such supporting members, and removable means interposed between said core plates for pressing the same apart and for holding the lateral ends thereof in engagement with said supporting members.

14. As a means for forming cores in 1101- low walls, the combination, with a air of core plates and means for supporting the work-facing sides of the lateral ends thereof, of a pair of removable reversely tapered members interposed between-said plates.

15. As a means for forming coresin hollow walls, the combination, with a pair of core plates and means for supporting the workfacing sides of the lateral ends thereof, of means for holding said plates in engagement with such supporting means, the last-mentioned means comprising a tapered, member having its inclined face provided with' a guideway and a reversely tapered member cooperating with such guideway.

16. As a means for forming cores in hollow walls, the combination, with a pair of core plates and means for supportm the work-facing sides of the lateral ends t ereof, of means for holding said plates in engagement with such supporting means, the last-mentioned means comprising a pair of reversely tapered channeled members, and means for retainin said members in operative relation to eac other.

17. As a means for forming cores in hollow walls, the combination, with a pair of core plates and means for supporting the edges provided each with a tenon or shoulder, the outer face of each tenon or shoulder being longer than the inner face, 9. Iming late applied to the inner face of the said mold plate and extending as far as the tenon or shoulder, a plate insertible between each lateral edge of the lining plate and the mold plate body and having an extension adapted to overlap the inner face of the tenon or shoulder, a pairv of channels each having flanges cooperating respectively with the outer face of a tenon or shoulder and the extension of the second plate,-and an angle iron applied to the top and bottom edges of the mold plate body and having its flange interposed between the lining plate and the said plate body.

19. The combination, with a core late, of a tie rod, a guide projection extending laterally from said rod, and a removable member cooperating with said projection and adapted to engage the Work-facing side of the lateral end of said plate.

20. The combination, with a core plate, of a tie rod, a brace projecting therefrom and having a flange extending toward said plate, and a removable 'mem'ber slidably plate.

interposed between said flange and the body of the tie rod and-adapted to engage the work-facing side of the lateral endof said I 21. The combination, with a core plate, of a tie rod having a plate extending laterally therefrom and provided with a flange projecting toward said core plate, and a removable angular member having a flange adapted to bear against the body of said rod and a flange engaging the tie rod late between the body of the tie rod and t e flange of said tie rod plate. I

22. The comb nation, with the proximate lateral ends of a pair of core plates, of a tie rod extending across the space between such ends, a pair of braces extending laterally in opposite directions from said-rod and each avinga flange presented toward the end of the core plate adjacent thereto, and. a core-plate engaging member removably inserted between the flange of each brace and the body of the tie rod.

23. As a means for forming cores in hollow walls, thecombination, with a pair of tie rods each having transversely spaced braces extending therefrom, ofa pair of mold plates interposed between saidbraces, and means removably inserted between such plates and adapted to force the plates apart and press the lateral edges thereof toward said braces. I

In testimon whereof, I hereunto aflix m signature in tlie presence of two witnesses.

HARRY O. DAVIDSON.-

Witnesses:

MARY M. FORD, WILLIAM W. have. 

